Get a Britannica Premium subscription and gain access to exclusive content. Salt is also employed in soap, glaze, and porcelain enamel manufacture and enters into metallurgical processes as a flux (a substance promoting fusing of metals). In the chemical industry, salt is required in the manufacture of sodium bicarbonate (baking soda), sodium hydroxide (caustic soda), hydrochloric acid, chlorine, and many other chemicals. It is employed for curing and preserving hides and as a brine for refrigeration. The meat-packing, sausage-making, fish-curing, and food-processing industries use salt as a preservative or seasoning or both. Livestock also require salt it is often made available in solid blocks. Iodized salt-that is, salt to which small quantities of potassium iodide have been added-is widely used in areas where iodine is lacking from the diet, a deficiency that can cause swelling of the thyroid gland, commonly called goitre. To ensure that this hygroscopic (i.e., water-attracting) substance will remain free-flowing when exposed to the atmosphere, small quantities of sodium aluminosilicate, tricalcium phosphate, or magnesium silicate are added. Table salt, used universally as a seasoning, is fine-grained and of high purity. Salt is essential to the health of both people and animals. Properties of common salt are shown in the Click Here to see full-size table table. The mineral form halite, or rock salt, is sometimes called common salt to distinguish it from a class of chemical compounds called salts. Salt (NaCl), sodium chloride, mineral substance of great importance to human and animal health, as well as to industry.

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Salt & storm kendall kulper